Standard: AAMA/WDMA/CSA 101/1.S.2/A440-17 – North American Fenestration Standard/Specification for windows, doors, and skylights

This fenestration Standard/Specification applies to both operating and fixed, new construction and replacement windows, doors, SSPs, TDDs, roof windows, and unit skylights installed into exterior building envelopes. This fenestration Standard/Specification establishes material-neutral, minimum, and optional performance requirements for windows, doors, SSPs, TDDs, roof windows, and unit skylights. This Standard/Specification concerns itself with the determination of Performance Grade (PG), design pressure (DP), and related performance ratings for windows, doors, SSPs, TDDs, roof windows, and unit skylights.

Performance requirements are used in this Standard/Specification when possible. Prescriptive requirements are used when necessary. When products are tested to the gateway requirements, or to the gateway and optional requirements, a rating is determined, and a test report may be issued.

Intended users include building officials, manufacturers, architects, engineers, consumers, builders, contractors, trade associations, test laboratories, specifiers, product evaluation and certification agencies, and government agencies. Two fundamental applications of this joint standard are product comparison and code compliance. With the title “North American Fenestration Standard,” it is tempting to think that NAFS applies equally to all fenestration products and that it is the single reference for addressing their structural-air-water properties; however, this is not the case. While NAFS applies to a great many fenestration products, it excludes from its scope many products used in larger buildings. Fortunately, the code recognizes this and provides complementary compliance paths for products within and outside the scope of the standard.


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